Hairbrush



FIG. 1 is a right side perspective view of a hairbrush showing my new design, for which a left side perspective view thereof is a mirror image;

FIG. 2 is an elevational view thereof as seen from the end of the head;

FIG. 3 is an elevational view thereof as seen from the end of the handle;

FIG. 4 is a right side elevational view thereof, the left side view being a mirror image;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top plan view thereof. 

The ornamental design for a hairbrush, as shown and described. 